<template>
<!-- 登录页面的整体盒子 -->
<div class="login-container">
    <!-- 登录的盒子 -->
    <div class="login-box">
        <!-- 标题的盒子 -->
        <div class="title-box"></div>
        <!-- 登录的表单区域 -->
        <el-form :model="loginForm" :rules="loginRules" ref="loginRef">
            <!-- 用户名 -->
            <el-form-item prop="username">
                <el-input v-model="loginForm.username" placeholder="请输入用户名"></el-input>
            </el-form-item>
            <!-- 密码 -->
            <el-form-item prop="password">
                <el-input v-model="loginForm.password" type="password" placeholder="请输入密码" maxlength="15" minlength="6"></el-input>
            </el-form-item>
            <el-form-item>
                <el-button type="primary" class="btn-login" @click="loginFn">登录</el-button>
                <el-link type="info" @click="$router.push('/reg')">去注册</el-link>
            </el-form-item>
        </el-form>
    </div>
</div>
</template>

<script>
import {
  loginAPI
} from '@/api'
import {
  mapMutations
} from 'vuex' // 1.将vuex的mutation函数内的方法映射过来
export default {
  name: 'my-login',
  data () {
    return {
      // 登录表单的数据对象
      loginForm: {
        username: '',
        password: ''
      },
      // 登录表单的验证规则对象
      loginRules: {
        username: [{
          required: true,
          message: '请输入用户名',
          trigger: 'blur'
        },
        {
          pattern: /^[a-zA-Z0-9]{1,10}$/,
          message: '用户名必须是1-10的字母数字',
          trigger: 'blur'
        }
        ],
        password: [{
          required: true,
          message: '请输入密码',
          trigger: 'blur'
        },
        {
          pattern: /^\S{6,15}$/,
          message: '密码必须是6-15的非空字符',
          trigger: 'blur'
        }
        ]
      }
    }
  },
  methods: {
    ...mapMutations(['updateToken']), // 2.将映射过来的mapMutation展开，内部数组写自己要用的方法
    // 登录点击事件
    loginFn () {
      this.$refs.loginRef.validate(async valid => {
        if (valid) {
          const {
            data: res
          } = await loginAPI(this.loginForm)
          console.log(res)
          if (res.code === 0) {
            this.$message.success(res.message)
            this.updateToken(res.token) // 3.调用vuex中mutation的方法
            console.log(res.token)
          } else {
            this.$message.error(res.message)
          }
          this.$router.push('/')
          // // 调用vuex中actions封装好的方法,获取并储存用户信息到vuex(方法一,在每次登录成功后储存,确保用户信息准确更新)
          // this.$store.dispatch('getUserInfoActions')
        } else {
          return false
        }
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login-container {
    background: url('../../assets/images/login_bg.jpg') center;
    background-size: cover;
    height: 100%;

    .login-box {
        width: 400px;
        height: 270px;
        background-color: #fff;
        border-radius: 3px;
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        padding: 0 30px;
        box-sizing: border-box;

        .title-box {
            height: 60px;
            background: url('../../assets/images/login_title.png') center no-repeat;
        }

        .btn-login {
            width: 100%;
        }
    }
}
</style>
